package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表添加一条数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && !dishFlavors.isEmpty()) {
            dishFlavors.forEach(
                    dishFlavor -> {
                        dishFlavor.setDishId(dishId);
                    });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page =  dishFlavorMapper.pageQuary(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否在起售(可以删除)
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //商品起售中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断是否被套餐关联
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetMealIdsByDishIds(ids);
        if(setmealIdsByDishIds != null && !setmealIdsByDishIds.isEmpty()){
            //当前菜品被套餐关联了
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中菜品数据
        //for (Long id : ids) {
        //    dishMapper.deleteById(id);
        //    //删除菜品口味数据
        //    dishFlavorMapper.deleteFlavorByDishId(id);
        //}
        //根据菜品id集合删除菜品和口味
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteFlavorById(ids);

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        DishVO dishVO = new DishVO();
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品数据查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品信息
     * @param dishDTO
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品信息
        dishMapper.update(dish);
        //删除菜品的口味数据
        dishFlavorMapper.deleteFlavorByDishId(dishDTO.getId());
        //插入口味数据
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && !dishFlavors.isEmpty()) {
            dishFlavors.forEach(
                    dishFlavor -> {
                        dishFlavor.setDishId(dishDTO.getId());
                    });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 根据分类id查询菜品信息
     *
     * @param categoryId
     */
    public List<Dish> getByCategoryID(Long categoryId) {
        return dishMapper.getByCategoryID(categoryId);
    }

    /**
     * 根据菜品id修改菜品销售状态
     * @param status
     * @param id
     */
    public void updateStatusById(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);//直接调用以前的根据id动态修改菜品数据接口就行
    }
}
